How to convert a float value in an array of character

float to array of char
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sprintf
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How can i copy a float value to an array of characters in c? For example the float variable x = 1.234 is copied to an array of char to become {‘ 1’ , ‘.’ , ‘2’ , ‘3’ , ‘4’}


You can convert your float number to string by using sprintf() function, such as:

char fnum_str[num]; // num is an integer number which large enough
int slen = sprintf(fnum_str,"%f",fnum); // fnum is your float number

Now, your number is converted to char array in a separate characteristic fnum_str. And you can access to the value by using fnum_str[i].

Converting float value to char *array, Converting float value to char *array. Hello, I have a pointer array. I am trying to convert float value into char so I can store it in the array. How it� 4 years, 3 months ago. Converting float value to char *array. Hello, I have a pointer array. I am trying to convert float value into char so I can store it in the array.


Better to use snprintf over sprintf, it address many risk of buffer overflow, when the developer underestimate the required size, or the input is not fully validated.

   int status = snprintf(arr, sizeof(arr), "%.3f", val) ;
   ... Check overflow if needed ...
   if ( status >= sizeof(arr) ) {
       .. Overflow
   }

printf, like few other functions in the original stdio (gets, vsprintf) rely on the programmer to create large enough buffers.

Converting float to char array in C / C ++, Recently I ran a test and there was an issue that asked for a number like 123.456 to be displayed as 321.456 . I thought the best solution would be to convert this� If all you need is the integer component of the float, itoa () will do the trick: itoa (f, string, 10); recasts floating point value f to an integer and converts it to a character array in base 10. To convert a floating point number with a specific number of decimals, I would still use itoa.


If you want to preserve all the information of a double into a string, Use a wide enough string and s*printf() with the %a, %e or %g format specifiers. These use textual floating point representation. Do not use "%f" (textual fixed point) which is uninformative with small values and too verbose with large ones.

#include <float.h>
//                    -       hex digits         .   p   -  expo \0
#define DBL_HEX_SIZE (1 + (DBL_MANT_DIG + 3)/4 + 1 + 1 + 1 + 8 + 1)
char s[DBL_HEX_SIZE * 2];  // No need to be stingy on buffer sizes.

snprintf(s, sizeof s, "%a", some_double);

or in decimal

#include <float.h>
//                    - digit .   dec digits            e   -  expo \0
#define DBL_DEC_SIZE (1 + 1 + 1 + (DBL_DECIMAL_DIG-1) + 1 + 1 + 8 + 1)
char s[DBL_DEC_SIZE * 2];  // No need to be stingy on buffer sizes.

snprintf(s, sizeof s, "%.*e", DBL_DECIMAL_DIG-1, some_double);

Details in Printf width specifier to maintain precision of floating-point value

Convert a floating point number to string in C, Write a C function ftoa() that converts a given floating-point number or a res[] -- > Array where output string to be stored afterpoint --> Number of digits to integral and fractional parts and convert them to strings separately. If you want to convert your Numpy float array to int, then you can use astype() function. To make one of this into an int, or one of the other types in numpy, use the numpy astype() method. Steps to Convert Numpy float to int array. Step 1: Create a numpy array with float values. Step 2: Convert Numpy float to int using numpy.atsype() function


Converting Float to String and Character Array in a Few Simple , Converting Float to String and Character Array in a Few Simple Steps - Arduino: Do you want to convert an floating point value to a string? If that is so, then there� I need to convert my float (sensor) value to a char array for sending my data through GPRS. If I use any library function for converting, it takes a lot of memory, because the controller has less amount of flash. I have tried my best to convert the data without a library function, but finally it needs the math.h file compulsorily. How can I


ftoa() – convert a floating point number to a character array on the , Converting floating point numbers to zero-terminated character strings is not natively supported for the Arduino. Sprintf() with the %f parameter� Program to convert float array to int: import numpy as np codespeedy_float_list = [45.45,84.75,69.12] array_int = np.array (codespeedy_float_list, dtype='int') print (array_int) import numpy as np. codespeedy_float_list = [45.45,84.75,69.12] array_int = np.array(codespeedy_float_list, dtype='int')


Convert Strings to Numbers and Numbers to Strings in Python, Python allows you to convert strings, integers, and floats interchangeably in a the array, allowing you to use indices to access a single character from the string. Since Python 3, integers are unbounded and can practically hold any number. s = num2str(A) converts a numeric array into a character array that represents the numbers. The output format depends on the magnitudes of the original values. num2str is useful for labeling and titling plots with numeric values.